Yup, yet another new term for malware on the social Web. "Wall spam" is comments on your Facebook wall purporting to be from a friend but which usually contain a link to some bad Web page that puts malicious code on your PC. The term "rose to notoriety earlier this month, when members started noticing the phenomenon, and security firms started flagging worms that were spreading via Facebook members' walls," CNET reports. Facebook appears to be on top of it (see this from the Washington Post). But tell your kids that, if they have a friend they haven't heard from in a long time and/or who just became a very bad speller, don't click! Better first to contact that friend by IM, phone, email, etc., and ask if s/he posted that comment.